package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;


@Service
    public class SetmealServiceImpl implements SetmealService {

        @Autowired
        private SetmealMapper setmealMapper;
        @Autowired
        private SetmealDishMapper setmealDishMapper;

        @Override
        @Transactional
        public void saveWithDishes(SetmealDTO setmealDTO) {
            Setmeal setmeal = new Setmeal();
            BeanUtils.copyProperties(setmealDTO, setmeal);
            //1.先插入套餐
            //2.插入套餐-菜品关系表
            setmealMapper.insert(setmeal);
            setmealDTO.getSetmealDishes().forEach(setmealDish -> {
                setmealDish.setSetmealId(setmeal.getId());
                setmealDishMapper.insertBatch(setmealDTO.getSetmealDishes());
            });
        }

        @Override
        public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
            PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

            Page page = setmealMapper.page(setmealPageQueryDTO);

            return new PageResult(page.getTotal(), page.getResult());
        }

        @Override
        public SetmealVO getByIdWithDish(Long id) {
            Setmeal setmeal = setmealMapper.findById(id);
            SetmealVO setmealVO = new SetmealVO();
            BeanUtils.copyProperties(setmeal,setmealVO);
            List<SetmealDish> setmealDishes = setmealDishMapper.findBySetmealId(id);
            setmealVO.setSetmealDishes(setmealDishes);
            return setmealVO;
        }

    @Transactional
    @Override
    public void updateWithDishes(SetmealDTO setmealDTO) {
        //1.修改套餐表
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        //2.删除套餐-菜品关系表
        setmealDishMapper.deleteBySteamId(setmealDTO.getId());
        //3.重新插入套餐-菜品关系数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealDTO.getId()));
//        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(id));
        setmealDishMapper.insertBatch(setmealDishes);
    }

    @Transactional
    @Override
    public void delete(Long[] ids) {
        //1. 判断套餐状态，是否可以删除，如果启售中不可以删除
        //2. 删除套餐表中的数据
        //3. 删除套餐-菜品关系表中的数据
        for (Long id : ids){
            Setmeal setmeal = setmealMapper.findById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE){
//                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
                throw new RuntimeException("起售中的套餐不能删除");
            }
            setmealMapper.delete(id);
            setmealDishMapper.deleteBySteamId(id);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Setmeal setmeal =new  Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);
    }
}